httptest.NewRequest设置上下文存根

I am creating a request stub in order to pass it to function under the tested:

request := httptest.NewRequest("GET", "http://example.com/foo", nil)

Question: can I also stub Context object for this request by adding request-uuid Value to it?

You have the request, you can do whatever you want to with it before you pass it along.

Use Request.Context() to access its context, use context.WithValue() to derive a new context.Context with your key-value in it, and use Request.WithContext() to acquire a new http.Request with the new context:

request := httptest.NewRequest("GET", "http://example.com/foo", nil)
ctx := request.Context()
ctx = context.WithValue(ctx, "request-uuid", "myvalue")
request = request.WithContext(ctx)

// now request's context contains the "request-uuid" key